Chelonoidis niger: Population traits

at T = 24 °C with background hazards for embryo, juv, adult: 0, 0, 0 1/d

Ln survival probability as function of age, with (dashed) and without (solid) thinning at max (red) and min (blue) scaled functional response for females.
Ln survivor function of the stable age distribution as function of age, with (dashed) and without (solid) thinning at max (red) and min (blue) scaled functional response for females.
model std f_minf f_max date: 2022/12/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.774793 0.802828 0.901414 0.901414 1 1 scaled functional response
r 1/d 0 0 0.000333504 3.52622e-05 0.000417713 5.09443e-05 spec pop growth rate
t2 d NaN NaN 2078.38 19657 1659.39 13606 population doubling time
a_b d 252.786 252.368 251.094 251.094 250.058 250.058 age at birth
t_p d 37614.7 15426.3 9916.42 9916.42 8215.6 8215.6 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_p - 1 0.303312 1 0.297531 1 0.292881 survival probability at puberty
theta_0b - 0.0035064 0.303446 0.0803257 0.405124 0.0991719 0.431803 frac of ind that is embryo
theta_bp - 0.00350708 0.166265 0.0738863 0.218202 0.089351 0.230032 fraction of individuals that is juvenile
theta_pi - 0.992987 0.530289 0.845788 0.376675 0.811477 0.338165 frac of ind that is adult
L_bi cm 27.0612 16.129 13.4606 10.3435 12.3436 9.0048 mean structural length of post-natals
L2_bi cm^2 752.297 406.878 243.871 223.752 212.325 185.033 mean squared structural length of post-natals
L3_bi cm^3 21135.6 11387.8 5191.83 6268.36 4420.06 5340.87 mean cubed structural length of post-natals
Ww_bi g 151281 84046.6 42385.7 51174.5 39548.2 47787.1 mean wet weight of post-natals
L_pi cm 27.1478 20.4312 14.413 14.935 13.4199 13.4804 mean structural length of adults
L2_pi cm^2 754.93 532.577 264.587 349.878 234.955 306.77 mean squared structural length of adults
L3_pi cm^3 21210.2 14953.5 5643.78 9890.57 4904.72 8963.26 mean cubed structural length of adults
Ww_pi g 151814 110363 46075.5 80745.9 43884.7 80198.2 mean wet weight of adults
R 1/d 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 137.464 77.0371 51.8439 47.5668 50.0742 43.6377 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.109375 0.109375 0.109375 0.109375 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 0 0.0333982 0.00464686 0.0368716 0.00623513 yield of living structure on food
Y_VX_d mol/mol 0.00240544 0.00628438 1.53384e-05 0.0106166 8.79134e-06 0.0128215 yield of dead structure on food
Y_EX mol/mol 0 0 0.239262 0.0332897 0.293035 0.0495533 yield of living reserve on food
Y_EX_d mol/mol 0.0148118 0.040097 0.000109883 0.0760569 6.98686e-05 0.101898 yield of dead reserve on food
Y_CX mol/mol 0.709644 0.685948 0.501994 0.622387 0.45552 0.585095 yield of CO2 on food
Y_HX mol/mol 0.754527 0.729333 0.533744 0.661752 0.484331 0.622101 yield of H2O on food
Y_OX mol/mol -0.900702 -0.870626 -0.637147 -0.789953 -0.57816 -0.742621 yield of O2 on food
Y_NX mol/mol 0.163764 0.158296 0.115845 0.143628 0.10512 0.135022 yield of N-waste on food
mu_TX J/mol 455159 439580 318485 397719 287722 373084 yield of heat on food

Remarks

  • Reprod-code O applies. Sex ratio is assumed to be 1:1. Parameters of male and female are the same.
  • Buffer handling rule: release each egg as soon as reproduction buffer allows
  • Weights of adults do not include reproduction buffer